S.S.Volosivets and B.I.Golubov. The Hardy and Bellman operators in spaces connected with $H(\mathbb{T})$ and $BMO(\mathbb{T})$
L.D.Gogoladze and V.Sh.Tsagareishvili. The absolute convergence of the Fourier–Haar series for two-dimensional functions
M.G.Grigoryan. The strong $L^1$-greedy property of the Walsh system
M.I.D'yachenko. The Hardy–Littlewood theorem for trigonometric series with generalized monotone coefficients
K.S.Kazarian, E.M.Semenov, and S.N.Uksusov. Bases of rearrangement invariant spaces
V.G.Krotov and M.A.Prokhorovich. The Luzin approximation of functions from classes $W^p_{\alpha}$ on metric spaces with measure
L.P.Kuvardina and A.P.Khromov. The equiconvergence of expansions in eigenfunctions and associated functions of an integral operator with involution
T.P.Lukashenko. The $A$-integral and its application in the study of P.L.Ul'yanov and other mathematicians
A.I.Rubinshtein. The best convergence of multiple trigonometric series
A.M.Sedletskii. Approximation of the Muntz–Szasz type in weight spaces $L^p$ and zeroes of functions of Bergman classes in a half-plane
E.A.Storozhenko. The Turan-type inequalities for complex polynomials in $L_0$-metrics